Terminal for pneumatic-despatch-tube apparatus.



J. T. COWLEY.

TERMINAL FOR PNEUMATIG DESPATGH TUBE APPARATUS.

APPLICATION FILED NOV.26, 1907. RENEWED MAY 17,-1912.

' 1,031,774. 4 Patented July 9,1912.

COLUMBIA PLANDGRAPH c6 WASHINGTON, D. C.

iii

SATES JAMES T. COWLEY, 0E BOSTON, MASSACHUSETTS, ASSIGNOR '10 LAMSON ooNSoLI- DATED STORE SERVICE COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION or NEW JERSEY.

TERMINAL FOR PNEUMATIC-DESPATCH-TUBE APPARATUS.

Specification of Letters Patent.

Patented July 9, 1912.

Application filed November 26, 1907, Serial No. 403,999. Renewed May 17, 1912. Serial No. 698,077.

To all whom it may concern Be it known that I, JAMES T. COWLEY, of Boston, in the county of Sufi'olk and State of Massachusetts, have invented certain new and useful Improvements in Terminals for Pneumatio-Despatoh-Tube Apparatus, of which the following is a specification.

My invention relates to improvements in terminals for pneumatic despatoh tube apparatus and its object is to automatically relieve the air pressure on the valve controlling the delivery opening in said terminals to permit the uninterrupted delivery of carriers therethrough. This is accomplished by automatically cutting off the terminal from the source of power when the carrier has arrived in said terminal thereby relieving the pressure on the delivery valve.

In the accompanying drawings is illustrated a form of construction embodying my invention in which,

Figure 1 is an elevation of the interior of an ordinary delivery terminal showing the device in normal position. Fig. 2 is a similar view to Fig. 1, showing the operation of the device by a carrier about to discharge.

Like letters of reference refer to like parts in the different views.

A represents the ordinary transmission tube connected with the upward discharge terminal B, and C is the usual transmission tube for the return of carriers connecting said terminal with a vacuum drum or other source of power.

B is the usual outwardly opening valve controlling the delivery opening of the terminal B and normally closed.

D is a butterfly valve pivoted at E to the casing of terminal B and adapted to control communication of saidterminal B with the source of vacuum through chamber K and tube O.

H is a trip lever pivoted at J and carrying a weight WV at one end, the opposite end projecting through the slot S into the path of the traveling carriers. The trip end of lever H is connected by a link G with an extension F on valve D.

WVith a carrier in transmission in the tube A toward the terminal B the valve D is open (see Fig. 1) and a current of air is maintained through tube A, terminal B, chamber K and tube 0 to the source of power in the direction indicated by the arrows. The vacuum is now acting on the valve B and the carrier when it arrives in the terminal B engages the trip lever H depressing the same and through link G closes the valve D cutting ofi the flow of air (see Fig. 9.) and destroying the action of the vacuum on valve B. The carrier now delivers easily through valve B by its own momentum. After the carrier has passed over the trip lever H the weight IV acts through said lever H and link G to open the valve D to permit the reestablishment of the air circuit.

Having thus described my invention and set forth a construction embodying the same, what I claim as new and desire to secure by Letters Patent of the United States is 1. In pneumatic despatch tube apparatus, an incoming transmission tube, an outgoing transmission tube, a carrier-discharge terminal leading from the end of the incoming transmission tube and provided with a Communication leading to the end of the outgoing transmission tube, a normally closed valve at the delivery opening of the terminal, a normally open valve insaid communication between the terminal and the outgoing tube, and mechanism for operating the latter 'valve mounted in the easing of the terminal. and projecting into the path of travel of the carriers inside of the delivery opening to be actuated by a passing carrier to move the latter valve to close the said communication momentarily before the carrier strikes the valve at the delivery opening of the terminal.

2. In pneumatic despatch tube apparatus, an incoming transmission tube, an outgoing transmission tube, a carrier-discharge terminal leading from the end of the incoming transmission tube and provided with acommunication leading to the end of the outgoing transmission tube, a normally open valve pivoted in the communication between the terminal and the outgoing tube, a triplever pivoted in the casing of the terminal normally projecting at one end into the path of travel of the carriers inside of the delivery opening of the terminal, and a link connecting said lever with the valve controlling the communication between the terminal and the end of the outgoing tube, said name to this specification in the presence of lever operating through the intervening tvvo subscribing Witnesses, this twelfth clay mechanism on being struck by a passing of November A. D. 1907.

carrier to close momentarily the latter valve JAMES T. COl/VLEY. 5 before the carrier strikes the valve at the Witnesses:

delivery opening of the terminal. 0. ZEMMIN,

In testimony whereof, I have signed my MARGARET M. LYONS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, I). G. v 

